A supported Pt atomic raft catalyst for electrochemical decomposition of water to produce hydrogen and a preparation method and application thereof
By using a supported Pt atom raft catalyst, Pt atoms are distributed in a monolayer on the surface of Cr2O3, which solves the problems of scarce reserves and low utilization of Pt-based catalysts, and achieves efficient electrochemical hydrogen production and easy mass production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FUDAN UNIVERSITY
- Filing Date
- 2024-12-13
- Publication Date
- 2026-06-16
Smart Images
Figure CN122214946A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of electrochemical water splitting for hydrogen production technology, and in particular relates to a supported Pt atomic raft catalyst for electrochemical water splitting for hydrogen production, its preparation method and application. Background Technology
[0002] Hydrogen is an ideal energy carrier and a significant alternative to traditional fossil fuels. Currently, hydrogen is widely used in various sustainable energy storage and conversion devices, such as hydrogen fuel cells and metal-air batteries. Producing hydrogen through electrochemical water splitting can reduce carbon emissions in traditional hydrogen production processes and alleviate the shortage of fossil fuels, making it a very promising technological approach.
[0003] Pt-based catalysts exhibit high activity for electrochemical water splitting to produce hydrogen and are recognized as highly efficient catalysts. However, Pt-based catalysts suffer from problems such as scarce Pt reserves, high cost, and low atom utilization, which greatly limit their large-scale application.
[0004] Therefore, there is an urgent need for a Pt-based catalyst and its preparation method that can improve the utilization rate of Pt atoms and reduce the amount of Pt used, so as to carry out large-scale application of Pt-based catalysts. Summary of the Invention
[0005] The purpose of this invention is to overcome the defects of the prior art by providing a supported Pt atomic raft catalyst for electrochemical water splitting to produce hydrogen, its preparation method and application. By dispersing Pt atoms at the atomic level, it can ensure high electrochemical hydrogen production catalytic performance and reduce the amount of Pt used, thereby improving the utilization rate of Pt atoms and reducing the amount of Pt used.
[0006] The objective of this invention can be achieved through the following technical solutions:
[0007] In a first aspect, the present invention provides a method for preparing a supported Pt atomic raft catalyst for electrochemical water splitting to produce hydrogen, the method comprising the following steps:
[0008] S1, Dissolve the Pt metal salt in deionized water to obtain a solution;
[0009] S2, Cr2O3 powder is dispersed in deionized water to obtain a dispersion;
[0010] S3, the solution obtained in step S1 and the dispersion obtained in step S2 are mixed and stirred, heated in a water bath, washed and dried to obtain catalyst powder, wherein the catalyst powder is a supported Pt atomic raft catalyst.
[0011] Furthermore, the Pt metal salt is H2PtCl6·xH2O.
[0012] Furthermore, the mass ratio of Pt metal salt to Cr2O3 is 1:20-100.
[0013] Further, in step S1, the Pt metal salt is dissolved in deionized water and sonicated for 1-5 minutes to obtain a solution.
[0014] Further, in step S2, Cr2O3 powder is dispersed in deionized water and sonicated for 1-5 minutes to obtain a dispersion.
[0015] Furthermore, in step S3, the water bath temperature is 60-80 degrees Celsius.
[0016] Furthermore, in step S3, the water bath time is 4-10 hours.
[0017] Further, in step S3, the washing process involves sequentially washing with deionized water and ethanol solvent.
[0018] Furthermore, in step S3, the drying process uses a vacuum drying oven at a temperature of 60 degrees Celsius for 12 hours.
[0019] Furthermore, in step S1, the obtained solution is a transparent solution; in step S2, the obtained dispersion is a dark green dispersion; and in step S3, the obtained catalyst powder is a dark green powder.
[0020] In a second aspect, the present invention provides a supported Pt atomic raft catalyst for electrochemical water splitting to produce hydrogen, which is obtained by the above-described preparation method.
[0021] Furthermore, in the supported Pt atomic raft catalyst, Pt metal is distributed in a monolayer metal raft form on the Cr2O3 surface.
[0022] In a third aspect, the present invention provides an application of a supported Pt atomic raft catalyst for electrochemical water splitting to produce hydrogen. The supported Pt atomic raft catalyst is obtained by the above preparation method, and the supported Pt atomic raft catalyst is used for electrochemical water splitting to produce hydrogen.
[0023] Furthermore, the supported Pt atom raft catalyst exhibits excellent catalytic performance in the electrochemical water splitting reaction for hydrogen production under acidic conditions.
[0024] Compared with the prior art, the present invention has the following advantages:
[0025] (1) This invention provides a method for preparing a supported Pt atomic raft catalyst for electrochemical water splitting to produce hydrogen. By dispersing Pt atoms at the atomic level, it can ensure high electrochemical hydrogen production catalytic performance and reduce the amount of Pt used.
[0026] (2) This invention provides a supported Pt atomic raft catalyst for electrochemical water splitting to produce hydrogen. The preparation method of this invention is simple, the conditions are mild, and it is easy to mass-produce. Attached Figure Description
[0027] Figure 1 This is a TEM image of the supported Pt atom raft catalyst generated in Example 1 of the present invention;
[0028] Figure 2 This is a graph showing the electrochemical water splitting hydrogen production performance of the supported Pt atom raft catalyst generated in Example 1 of the present invention. Detailed Implementation
[0029] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.
[0030] Unless otherwise specified in this technical solution, the component model, material name, connection structure, control method, algorithm, and other features are considered to be common technical features disclosed in the prior art.
[0031] It should be noted that, in this invention, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.
[0032] In the following embodiments, unless otherwise specified, the raw materials or processing techniques are all commercially available materials or conventional processing techniques in the art.
[0033] In the following examples, the H2PtCl6·xH2O used was purchased from Sigma-Aldrich, CAS No. 26023-84-7.
[0034] In the following examples, the Cr2O3 powder is the Cr2O3 described in Two-Dimensional Amorphous Cr2O3 Modified Metallic Electrodes for Hydrogen Evolution Reaction (Phys.Status Solidi RRL2019, 13, 1900025).
[0035] In the following comparative examples, the commercial Pt / C catalyst was purchased from Alfa Aesar, model number HiSPEC, and the Pt loading was 20 wt%.
[0036] Example 1
[0037] This embodiment provides a method for preparing a supported Pt atomic raft catalyst for electrochemical water splitting to produce hydrogen.
[0038] The preparation process of supported Pt atomic raft catalysts includes:
[0039] S1, Dissolve 5 mg of H2PtCl6·xH2O in 1 mL of deionized water and sonicate for 1 min to obtain a transparent solution;
[0040] S2, 100 mg Cr2O3 powder was dispersed in 29 mL of deionized water and sonicated for 1 min to obtain a dark green dispersion;
[0041] S3. The above solution and dispersion were mixed, and the mixture was magnetically stirred in a 60°C water bath for 4 hours at a speed of 500 r / min. The mixture was then washed with deionized water and ethanol solvent in sequence, and vacuum dried at 60°C for 12 hours to obtain dark green powder PtAR@Cr2O3.
[0042] like Figure 1 The product shown is the product of this embodiment, in which Pt metal is distributed in a monolayer metal raft on the surface of Cr2O3, which helps to improve the dispersion and stability of metal atoms, increase the exposure area of metal active sites, and improve the overall catalytic activity.
[0043] like Figure 2 The figure shows the electrochemical water splitting hydrogen production performance of the product of this embodiment. The catalyst was used in the electrochemical water splitting hydrogen production reaction electrode, with a 0.5 M H₂SO₄ solution as the electrolyte and a pH of approximately 0. The supported Pt atomic raft catalyst exhibited excellent performance under acidic conditions, far exceeding that of commercial Pt / C catalysts. The catalyst of this embodiment showed a current density of approximately 60 mA cm⁻¹ at 0.02 V (vs RHE). 2 In contrast, the comparative commercial Pt / C catalyst exhibits a current density of less than 10 mA cm⁻¹ at 0.02 V (vs RHE). 2 .
[0044] Example 2
[0045] This embodiment provides a method for preparing a supported Pt atomic raft catalyst for electrochemical water splitting to produce hydrogen.
[0046] The only difference between Example 2 and Example 1 is that:
[0047] In S2, 500 mg of Cr2O3 powder was dispersed in 29 mL of deionized water.
[0048] In this embodiment, Pt metal is distributed in a monolayer metal raft on the surface of Cr2O3.
[0049] Comparative Example 1
[0050] This comparative example provides a catalyst, which is a commercially available Pt / C catalyst.
[0051] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.
Claims
1. A method for preparing a supported Pt atomic raft catalyst for electrochemical water splitting to produce hydrogen, characterized in that, The preparation method includes the following steps: S1, Dissolve the Pt metal salt in deionized water to obtain a solution; S2, Cr2O3 powder is dispersed in deionized water to obtain a dispersion; S3, the solution obtained in step S1 and the dispersion obtained in step S2 are mixed and stirred, heated in a water bath, washed and dried to obtain catalyst powder, wherein the catalyst powder is a supported Pt atomic raft catalyst.
2. The method for preparing a supported Pt atomic raft catalyst for electrochemical water splitting to produce hydrogen according to claim 1, characterized in that, The Pt metal salt is H2PtCl6·xH2O.
3. The method for preparing a supported Pt atomic raft catalyst for electrochemical water splitting to produce hydrogen according to claim 1, characterized in that, The mass ratio of Pt metal salt to Cr2O3 is 1:20-100.
4. The method for preparing a supported Pt atomic raft catalyst for electrochemical water splitting to produce hydrogen according to claim 1, characterized in that, In step S3, the water bath temperature is 60-80 degrees Celsius; In step S3, the water bath time is 4-10 hours.
5. The method for preparing a supported Pt atomic raft catalyst for electrochemical water splitting to produce hydrogen according to claim 1, characterized in that, In step S3, the washing process involves sequentially washing with deionized water and ethanol solvent.
6. The method for preparing a supported Pt atomic raft catalyst for electrochemical water splitting to produce hydrogen according to claim 1, characterized in that, In step S3, the drying process uses a vacuum drying oven at a temperature of 60 degrees Celsius for 12 hours.
7. The method for preparing a supported Pt atomic raft catalyst for electrochemical water splitting to produce hydrogen according to claim 1, characterized in that, In step S1, the resulting solution is a transparent solution; In step S2, the resulting dispersion is a dark green dispersion; In step S3, the obtained catalyst powder is dark green.
8. A supported Pt atom raft catalyst for electrochemical water splitting to produce hydrogen, characterized in that, The Pt atomic raft catalyst is prepared using the preparation method described in any one of claims 1-7.
9. A supported Pt atom raft catalyst for electrochemical water splitting to produce hydrogen according to claim 8, characterized in that, In the supported Pt atomic raft catalyst, Pt metal is distributed in a monolayer metal raft shape on the Cr2O3 surface.
10. The application of a supported Pt atomic raft catalyst for electrochemical water splitting to produce hydrogen, obtained by the preparation method according to any one of claims 1-8, characterized in that, The supported Pt atom raft catalyst was used for electrochemical water splitting to produce hydrogen.